A Cathay Pacific Airbus A350-1000, registration B-LXI performing flight CX-383 from Hong Kong (China) to Zurich (Switzerland), was climbing out of Hong Kong's runway 07R when the crew stopped the climb at 9000 feet after receiving a right hand engine (Trent XWB) fire warning. The crew worked the related checklists shutting the engine down and discharging one fire bottle with the fire warning ceasing, dumped fuel and returned to Hong Kong for a safe landing on runway 07L about 70 minutes after departure.